./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/feedback_diverge.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/feedback_diverge.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a6e296367f1fe3cf145b6868ec70c2d770b2281a31a9d7dcae84843c6ed48125 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:10:16,373 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:10:16,376 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:10:16,409 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:10:16,409 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:10:16,411 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:10:16,413 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:10:16,415 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:10:16,417 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:10:16,419 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:10:16,421 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:10:16,423 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:10:16,425 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:10:16,427 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:10:16,429 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:10:16,430 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:10:16,432 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:10:16,433 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:10:16,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:10:16,446 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:10:16,451 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:10:16,453 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:10:16,456 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:10:16,457 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:10:16,465 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:10:16,471 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:10:16,471 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:10:16,473 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:10:16,474 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:10:16,476 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:10:16,477 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:10:16,478 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:10:16,481 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:10:16,482 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:10:16,484 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:10:16,484 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:10:16,485 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:10:16,485 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:10:16,486 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:10:16,487 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:10:16,488 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:10:16,489 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:10:16,536 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:10:16,536 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:10:16,537 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:10:16,537 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:10:16,538 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:10:16,545 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:10:16,545 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:10:16,545 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:10:16,546 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:10:16,546 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:10:16,547 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:10:16,547 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:10:16,548 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:10:16,548 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:10:16,548 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:10:16,548 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:10:16,549 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:10:16,549 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:10:16,550 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:10:16,550 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:10:16,550 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:10:16,550 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:10:16,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:10:16,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:10:16,551 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:10:16,551 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:10:16,553 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:10:16,553 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:10:16,553 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:10:16,554 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:10:16,554 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:10:16,554 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:10:16,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:10:16,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:10:16,555 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:10:16,555 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:10:16,556 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:10:16,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:10:16,556 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:10:16,556 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:10:16,557 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:10:16,557 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6e296367f1fe3cf145b6868ec70c2d770b2281a31a9d7dcae84843c6ed48125 [2021-11-23 17:10:16,900 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:10:16,923 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:10:16,925 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:10:16,927 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:10:16,928 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:10:16,929 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/float-benchs/feedback_diverge.c [2021-11-23 17:10:17,019 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/data/f2f96c4c0/ea65b6b47ba44314b5c5507a8b74c07c/FLAGe5ce1a24c [2021-11-23 17:10:17,628 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:10:17,628 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/sv-benchmarks/c/float-benchs/feedback_diverge.c [2021-11-23 17:10:17,643 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/data/f2f96c4c0/ea65b6b47ba44314b5c5507a8b74c07c/FLAGe5ce1a24c [2021-11-23 17:10:18,002 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/data/f2f96c4c0/ea65b6b47ba44314b5c5507a8b74c07c [2021-11-23 17:10:18,008 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:10:18,009 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:10:18,024 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:10:18,024 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:10:18,027 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:10:18,028 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:10:18" (1/1) ... [2021-11-23 17:10:18,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66c74573 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:18, skipping insertion in model container [2021-11-23 17:10:18,030 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:10:18" (1/1) ... [2021-11-23 17:10:18,036 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:10:18,055 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:10:18,294 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/sv-benchmarks/c/float-benchs/feedback_diverge.c[626,639] [2021-11-23 17:10:18,311 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:10:18,320 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:10:18,334 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/sv-benchmarks/c/float-benchs/feedback_diverge.c[626,639] [2021-11-23 17:10:18,339 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:10:18,354 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:10:18,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:18 WrapperNode [2021-11-23 17:10:18,355 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:10:18,356 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:10:18,357 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:10:18,357 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:10:18,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:18" (1/1) ... [2021-11-23 17:10:18,372 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:18" (1/1) ... [2021-11-23 17:10:18,391 INFO L137 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 47 [2021-11-23 17:10:18,392 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:10:18,393 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:10:18,393 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:10:18,393 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:10:18,402 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:18" (1/1) ... [2021-11-23 17:10:18,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:18" (1/1) ... [2021-11-23 17:10:18,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:18" (1/1) ... [2021-11-23 17:10:18,404 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:18" (1/1) ... [2021-11-23 17:10:18,409 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:18" (1/1) ... [2021-11-23 17:10:18,413 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:18" (1/1) ... [2021-11-23 17:10:18,414 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:18" (1/1) ... [2021-11-23 17:10:18,416 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:10:18,417 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:10:18,417 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:10:18,417 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:10:18,422 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:18" (1/1) ... [2021-11-23 17:10:18,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:10:18,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:10:18,465 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:10:18,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:10:18,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:10:18,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:10:18,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:10:18,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:10:18,604 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:10:18,606 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:10:18,715 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:10:18,731 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 17:10:18,736 INFO L158 Benchmark]: Toolchain (without parser) took 725.22ms. Allocated memory is still 104.9MB. Free memory was 69.1MB in the beginning and 67.1MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:10:18,737 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 104.9MB. Free memory was 78.9MB in the beginning and 78.9MB in the end (delta: 29.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:10:18,738 INFO L158 Benchmark]: CACSL2BoogieTranslator took 331.84ms. Allocated memory is still 104.9MB. Free memory was 68.9MB in the beginning and 79.2MB in the end (delta: -10.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 17:10:18,739 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.93ms. Allocated memory is still 104.9MB. Free memory was 79.2MB in the beginning and 77.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:10:18,740 INFO L158 Benchmark]: Boogie Preprocessor took 23.34ms. Allocated memory is still 104.9MB. Free memory was 77.6MB in the beginning and 76.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:10:18,741 INFO L158 Benchmark]: RCFGBuilder took 317.03ms. Allocated memory is still 104.9MB. Free memory was 76.5MB in the beginning and 67.1MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 17:10:18,745 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 104.9MB. Free memory was 78.9MB in the beginning and 78.9MB in the end (delta: 29.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 331.84ms. Allocated memory is still 104.9MB. Free memory was 68.9MB in the beginning and 79.2MB in the end (delta: -10.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.93ms. Allocated memory is still 104.9MB. Free memory was 79.2MB in the beginning and 77.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 23.34ms. Allocated memory is still 104.9MB. Free memory was 77.6MB in the beginning and 76.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 317.03ms. Allocated memory is still 104.9MB. Free memory was 76.5MB in the beginning and 67.1MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:10:18,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/feedback_diverge.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a6e296367f1fe3cf145b6868ec70c2d770b2281a31a9d7dcae84843c6ed48125 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:10:21,362 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:10:21,364 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:10:21,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:10:21,404 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:10:21,405 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:10:21,407 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:10:21,410 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:10:21,412 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:10:21,414 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:10:21,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:10:21,417 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:10:21,417 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:10:21,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:10:21,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:10:21,422 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:10:21,423 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:10:21,424 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:10:21,427 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:10:21,429 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:10:21,431 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:10:21,433 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:10:21,435 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:10:21,436 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:10:21,440 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:10:21,441 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:10:21,441 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:10:21,442 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:10:21,443 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:10:21,444 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:10:21,445 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:10:21,446 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:10:21,447 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:10:21,448 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:10:21,449 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:10:21,449 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:10:21,450 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:10:21,450 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:10:21,451 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:10:21,452 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:10:21,453 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:10:21,453 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:10:21,499 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:10:21,499 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:10:21,500 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:10:21,500 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:10:21,501 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:10:21,501 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:10:21,502 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:10:21,502 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:10:21,502 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:10:21,502 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:10:21,503 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:10:21,504 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:10:21,505 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:10:21,506 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:10:21,506 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:10:21,506 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:10:21,506 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:10:21,507 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:10:21,507 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:10:21,507 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:10:21,507 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:10:21,507 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:10:21,508 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:10:21,508 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:10:21,508 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:10:21,508 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:10:21,509 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:10:21,509 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:10:21,509 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:10:21,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:10:21,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:10:21,510 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:10:21,510 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:10:21,511 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:10:21,511 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:10:21,511 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:10:21,511 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:10:21,512 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:10:21,512 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6e296367f1fe3cf145b6868ec70c2d770b2281a31a9d7dcae84843c6ed48125 [2021-11-23 17:10:21,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:10:21,977 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:10:21,980 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:10:21,982 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:10:21,982 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:10:21,985 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/float-benchs/feedback_diverge.c [2021-11-23 17:10:22,065 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/data/5ba5519a9/fb5a018ac616483091121ea46e72160c/FLAG33eb304c5 [2021-11-23 17:10:22,698 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:10:22,699 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/sv-benchmarks/c/float-benchs/feedback_diverge.c [2021-11-23 17:10:22,706 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/data/5ba5519a9/fb5a018ac616483091121ea46e72160c/FLAG33eb304c5 [2021-11-23 17:10:23,061 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/data/5ba5519a9/fb5a018ac616483091121ea46e72160c [2021-11-23 17:10:23,064 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:10:23,066 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:10:23,067 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:10:23,068 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:10:23,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:10:23,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:10:23" (1/1) ... [2021-11-23 17:10:23,085 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c44b9b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:23, skipping insertion in model container [2021-11-23 17:10:23,085 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:10:23" (1/1) ... [2021-11-23 17:10:23,094 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:10:23,112 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:10:23,252 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/sv-benchmarks/c/float-benchs/feedback_diverge.c[626,639] [2021-11-23 17:10:23,268 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:10:23,281 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:10:23,297 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/sv-benchmarks/c/float-benchs/feedback_diverge.c[626,639] [2021-11-23 17:10:23,303 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:10:23,319 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:10:23,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:23 WrapperNode [2021-11-23 17:10:23,319 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:10:23,321 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:10:23,321 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:10:23,321 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:10:23,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:23" (1/1) ... [2021-11-23 17:10:23,380 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:23" (1/1) ... [2021-11-23 17:10:23,405 INFO L137 Inliner]: procedures = 17, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 47 [2021-11-23 17:10:23,405 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:10:23,407 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:10:23,407 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:10:23,408 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:10:23,417 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:23" (1/1) ... [2021-11-23 17:10:23,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:23" (1/1) ... [2021-11-23 17:10:23,433 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:23" (1/1) ... [2021-11-23 17:10:23,433 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:23" (1/1) ... [2021-11-23 17:10:23,440 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:23" (1/1) ... [2021-11-23 17:10:23,451 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:23" (1/1) ... [2021-11-23 17:10:23,458 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:23" (1/1) ... [2021-11-23 17:10:23,461 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:10:23,462 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:10:23,462 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:10:23,462 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:10:23,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:23" (1/1) ... [2021-11-23 17:10:23,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:10:23,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:10:23,500 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:10:23,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:10:23,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:10:23,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:10:23,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:10:23,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:10:23,653 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:10:23,655 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:10:24,198 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:10:24,205 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:10:24,205 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:10:24,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:10:24 BoogieIcfgContainer [2021-11-23 17:10:24,221 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:10:24,223 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:10:24,223 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:10:24,227 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:10:24,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:10:23" (1/3) ... [2021-11-23 17:10:24,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c45e4c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:10:24, skipping insertion in model container [2021-11-23 17:10:24,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:23" (2/3) ... [2021-11-23 17:10:24,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c45e4c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:10:24, skipping insertion in model container [2021-11-23 17:10:24,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:10:24" (3/3) ... [2021-11-23 17:10:24,230 INFO L111 eAbstractionObserver]: Analyzing ICFG feedback_diverge.c [2021-11-23 17:10:24,252 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:10:24,252 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:10:24,305 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:10:24,313 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 17:10:24,314 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:10:24,329 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:10:24,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 17:10:24,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:10:24,336 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 17:10:24,337 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:10:24,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:10:24,358 INFO L85 PathProgramCache]: Analyzing trace with hash 889620925, now seen corresponding path program 1 times [2021-11-23 17:10:24,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:10:24,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [921464564] [2021-11-23 17:10:24,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:10:24,390 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:10:24,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:10:24,402 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:10:24,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:10:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:10:24,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:10:24,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:10:24,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:10:24,621 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:10:24,622 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:10:24,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [921464564] [2021-11-23 17:10:24,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [921464564] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:10:24,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:10:24,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:10:24,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441846769] [2021-11-23 17:10:24,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:10:24,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:10:24,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:10:24,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:10:24,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:10:24,702 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:10:24,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:10:24,741 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2021-11-23 17:10:24,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:10:24,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 17:10:24,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:10:24,757 INFO L225 Difference]: With dead ends: 39 [2021-11-23 17:10:24,757 INFO L226 Difference]: Without dead ends: 20 [2021-11-23 17:10:24,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:10:24,767 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:10:24,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 30 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:10:24,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-23 17:10:24,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2021-11-23 17:10:24,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:10:24,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-11-23 17:10:24,819 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 6 [2021-11-23 17:10:24,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:10:24,819 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-11-23 17:10:24,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:10:24,820 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-11-23 17:10:24,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 17:10:24,821 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:10:24,821 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:10:24,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:10:25,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:10:25,055 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:10:25,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:10:25,059 INFO L85 PathProgramCache]: Analyzing trace with hash -875759451, now seen corresponding path program 1 times [2021-11-23 17:10:25,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:10:25,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1298720016] [2021-11-23 17:10:25,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:10:25,062 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:10:25,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:10:25,063 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:10:25,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:10:25,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:10:25,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:10:25,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:10:25,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:10:25,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:10:25,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:10:25,478 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:10:25,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1298720016] [2021-11-23 17:10:25,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1298720016] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:10:25,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1967162423] [2021-11-23 17:10:25,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:10:25,479 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:10:25,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:10:25,490 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:10:25,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-23 17:10:25,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:10:25,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:10:25,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:10:25,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:10:25,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:10:25,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:10:25,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1967162423] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:10:25,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461803406] [2021-11-23 17:10:25,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:10:25,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:10:25,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:10:25,898 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:10:25,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 17:10:26,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:10:26,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:10:26,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:10:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:10:26,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:10:26,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:10:26,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461803406] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:10:26,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:10:26,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2021-11-23 17:10:26,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635532768] [2021-11-23 17:10:26,197 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:10:26,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:10:26,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:10:26,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:10:26,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:10:26,200 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:10:26,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:10:26,306 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-11-23 17:10:26,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:10:26,310 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 17:10:26,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:10:26,311 INFO L225 Difference]: With dead ends: 39 [2021-11-23 17:10:26,311 INFO L226 Difference]: Without dead ends: 35 [2021-11-23 17:10:26,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:10:26,314 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 41 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:10:26,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 44 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:10:26,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-23 17:10:26,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-11-23 17:10:26,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:10:26,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-11-23 17:10:26,322 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 11 [2021-11-23 17:10:26,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:10:26,323 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-11-23 17:10:26,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:10:26,332 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-11-23 17:10:26,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 17:10:26,348 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:10:26,348 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-23 17:10:26,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:10:26,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:10:26,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-23 17:10:26,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:10:26,949 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:10:26,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:10:26,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1424528451, now seen corresponding path program 2 times [2021-11-23 17:10:26,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:10:26,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1938841417] [2021-11-23 17:10:26,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:10:26,953 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:10:26,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:10:26,954 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:10:26,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:10:27,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:10:27,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:10:27,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 17:10:27,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:10:35,615 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 17:10:35,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:10:46,096 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~B~0#1| (fp.mul c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 2.0) |c_ULTIMATE.start_main_~B~0#1|) |c_ULTIMATE.start_main_~A~0#1|) |c_ULTIMATE.start_main_~X~0#1|) ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 200.0))))) (.cse1 ((_ to_fp 8 24) c_currentRoundingMode 100.0))) (and (fp.geq .cse0 (fp.neg .cse1)) (fp.leq .cse0 .cse1))) is different from false [2021-11-23 17:10:48,120 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~B~0#1| (fp.mul c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 2.0) |c_ULTIMATE.start_main_~B~0#1|) |c_ULTIMATE.start_main_~A~0#1|) |c_ULTIMATE.start_main_~X~0#1|) ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 200.0))))) (.cse1 ((_ to_fp 8 24) c_currentRoundingMode 100.0))) (and (fp.geq .cse0 (fp.neg .cse1)) (fp.leq .cse0 .cse1))) is different from true [2021-11-23 17:10:58,318 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~B~0#1| (fp.mul c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 2.0) |c_ULTIMATE.start_main_~B~0#1|) |c_ULTIMATE.start_main_~A~0#1|) |c_ULTIMATE.start_main_~B~0#1|) ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 200.0))))) (.cse1 ((_ to_fp 8 24) c_currentRoundingMode 100.0))) (and (fp.geq .cse0 (fp.neg .cse1)) (fp.leq .cse0 .cse1))) is different from false [2021-11-23 17:11:33,438 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (let ((.cse3 ((_ to_fp 8 24) c_currentRoundingMode 2.0)) (.cse4 ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 200.0)))) (let ((.cse2 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~B~0#1| (fp.mul c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse3 |c_ULTIMATE.start_main_~B~0#1|) |c_ULTIMATE.start_main_~A~0#1|) |c_ULTIMATE.start_main_~X~0#1|) .cse4)))) (fp.sub c_currentRoundingMode .cse2 (fp.mul c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse3 .cse2) |c_ULTIMATE.start_main_~X~0#1|) .cse2) .cse4))))) (.cse1 ((_ to_fp 8 24) c_currentRoundingMode 100.0))) (and (fp.leq .cse0 .cse1) (fp.geq .cse0 (fp.neg .cse1)))) is different from false [2021-11-23 17:11:35,480 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (let ((.cse3 ((_ to_fp 8 24) c_currentRoundingMode 2.0)) (.cse4 ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 200.0)))) (let ((.cse2 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~B~0#1| (fp.mul c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse3 |c_ULTIMATE.start_main_~B~0#1|) |c_ULTIMATE.start_main_~A~0#1|) |c_ULTIMATE.start_main_~X~0#1|) .cse4)))) (fp.sub c_currentRoundingMode .cse2 (fp.mul c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse3 .cse2) |c_ULTIMATE.start_main_~X~0#1|) .cse2) .cse4))))) (.cse1 ((_ to_fp 8 24) c_currentRoundingMode 100.0))) (and (fp.leq .cse0 .cse1) (fp.geq .cse0 (fp.neg .cse1)))) is different from true [2021-11-23 17:11:45,830 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (let ((.cse3 ((_ to_fp 8 24) c_currentRoundingMode 2.0)) (.cse4 ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 200.0)))) (let ((.cse2 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~B~0#1| (fp.mul c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse3 |c_ULTIMATE.start_main_~B~0#1|) |c_ULTIMATE.start_main_~A~0#1|) |c_ULTIMATE.start_main_~B~0#1|) .cse4)))) (fp.sub c_currentRoundingMode .cse2 (fp.mul c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse3 .cse2) |c_ULTIMATE.start_main_~B~0#1|) .cse2) .cse4))))) (.cse1 ((_ to_fp 8 24) c_currentRoundingMode 100.0))) (and (fp.geq .cse0 (fp.neg .cse1)) (fp.leq .cse0 .cse1))) is different from false [2021-11-23 17:12:21,166 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (let ((.cse3 ((_ to_fp 8 24) c_currentRoundingMode 2.0)) (.cse5 ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 200.0)))) (let ((.cse4 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~B~0#1| (fp.mul c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse3 |c_ULTIMATE.start_main_~B~0#1|) |c_ULTIMATE.start_main_~A~0#1|) |c_ULTIMATE.start_main_~X~0#1|) .cse5)))) (let ((.cse2 (fp.sub c_currentRoundingMode .cse4 (fp.mul c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse3 .cse4) |c_ULTIMATE.start_main_~X~0#1|) .cse4) .cse5)))) (fp.sub c_currentRoundingMode .cse2 (fp.mul c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse3 .cse2) .cse4) .cse2) .cse5)))))) (.cse1 ((_ to_fp 8 24) c_currentRoundingMode 100.0))) (and (fp.geq .cse0 (fp.neg .cse1)) (fp.leq .cse0 .cse1))) is different from false [2021-11-23 17:12:23,237 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (let ((.cse3 ((_ to_fp 8 24) c_currentRoundingMode 2.0)) (.cse5 ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 200.0)))) (let ((.cse4 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~B~0#1| (fp.mul c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse3 |c_ULTIMATE.start_main_~B~0#1|) |c_ULTIMATE.start_main_~A~0#1|) |c_ULTIMATE.start_main_~X~0#1|) .cse5)))) (let ((.cse2 (fp.sub c_currentRoundingMode .cse4 (fp.mul c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse3 .cse4) |c_ULTIMATE.start_main_~X~0#1|) .cse4) .cse5)))) (fp.sub c_currentRoundingMode .cse2 (fp.mul c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse3 .cse2) .cse4) .cse2) .cse5)))))) (.cse1 ((_ to_fp 8 24) c_currentRoundingMode 100.0))) (and (fp.geq .cse0 (fp.neg .cse1)) (fp.leq .cse0 .cse1))) is different from true [2021-11-23 17:12:33,847 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (let ((.cse3 ((_ to_fp 8 24) c_currentRoundingMode 2.0)) (.cse5 ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 200.0)))) (let ((.cse4 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~B~0#1| (fp.mul c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse3 |c_ULTIMATE.start_main_~B~0#1|) |c_ULTIMATE.start_main_~A~0#1|) |c_ULTIMATE.start_main_~B~0#1|) .cse5)))) (let ((.cse2 (fp.sub c_currentRoundingMode .cse4 (fp.mul c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse3 .cse4) |c_ULTIMATE.start_main_~B~0#1|) .cse4) .cse5)))) (fp.sub c_currentRoundingMode .cse2 (fp.mul c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse3 .cse2) .cse4) .cse2) .cse5)))))) (.cse1 ((_ to_fp 8 24) c_currentRoundingMode 100.0))) (and (fp.leq .cse0 .cse1) (fp.geq .cse0 (fp.neg .cse1)))) is different from false [2021-11-23 17:12:35,919 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (let ((.cse3 ((_ to_fp 8 24) c_currentRoundingMode 2.0)) (.cse5 ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 200.0)))) (let ((.cse4 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~B~0#1| (fp.mul c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse3 |c_ULTIMATE.start_main_~B~0#1|) |c_ULTIMATE.start_main_~A~0#1|) |c_ULTIMATE.start_main_~B~0#1|) .cse5)))) (let ((.cse2 (fp.sub c_currentRoundingMode .cse4 (fp.mul c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse3 .cse4) |c_ULTIMATE.start_main_~B~0#1|) .cse4) .cse5)))) (fp.sub c_currentRoundingMode .cse2 (fp.mul c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse3 .cse2) .cse4) .cse2) .cse5)))))) (.cse1 ((_ to_fp 8 24) c_currentRoundingMode 100.0))) (and (fp.leq .cse0 .cse1) (fp.geq .cse0 (fp.neg .cse1)))) is different from true [2021-11-23 17:12:44,451 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 31 not checked. [2021-11-23 17:12:44,451 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:12:44,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1938841417] [2021-11-23 17:12:44,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1938841417] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:12:44,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [283035112] [2021-11-23 17:12:44,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:12:44,452 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:12:44,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:12:44,455 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:12:44,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-23 17:12:45,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:12:45,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:12:45,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:12:45,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:12:45,940 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:12:45,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:12:46,710 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:12:46,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [283035112] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:12:46,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631362952] [2021-11-23 17:12:46,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:12:46,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:12:46,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:12:46,717 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:12:46,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 17:12:47,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:12:47,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:12:47,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:12:47,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:12:47,362 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:12:47,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:12:47,585 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:12:47,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631362952] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:12:47,586 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:12:47,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 7, 7, 7, 7] total 29 [2021-11-23 17:12:47,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414604958] [2021-11-23 17:12:47,586 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:12:47,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-23 17:12:47,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:12:47,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-23 17:12:47,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=420, Unknown=10, NotChecked=282, Total=812 [2021-11-23 17:12:47,593 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 29 states, 29 states have (on average 3.103448275862069) internal successors, (90), 29 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:12:50,187 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (let ((.cse3 ((_ to_fp 8 24) c_currentRoundingMode 2.0)) (.cse5 ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 200.0)))) (let ((.cse4 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~B~0#1| (fp.mul c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse3 |c_ULTIMATE.start_main_~B~0#1|) |c_ULTIMATE.start_main_~A~0#1|) |c_ULTIMATE.start_main_~B~0#1|) .cse5)))) (let ((.cse2 (fp.sub c_currentRoundingMode .cse4 (fp.mul c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse3 .cse4) |c_ULTIMATE.start_main_~B~0#1|) .cse4) .cse5)))) (fp.sub c_currentRoundingMode .cse2 (fp.mul c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse3 .cse2) .cse4) .cse2) .cse5)))))) (.cse1 ((_ to_fp 8 24) c_currentRoundingMode 100.0))) (and (= (_ +zero 8 24) |c_ULTIMATE.start_main_~B~0#1|) (= |c_ULTIMATE.start_main_~i~0#1| (_ bv0 32)) (fp.leq .cse0 .cse1) (= (_ +zero 8 24) |c_ULTIMATE.start_main_~A~0#1|) (= c_currentRoundingMode roundNearestTiesToEven) (fp.geq .cse0 (fp.neg .cse1)))) is different from true [2021-11-23 17:12:52,747 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (let ((.cse3 ((_ to_fp 8 24) c_currentRoundingMode 2.0)) (.cse5 ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 200.0)))) (let ((.cse4 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~B~0#1| (fp.mul c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse3 |c_ULTIMATE.start_main_~B~0#1|) |c_ULTIMATE.start_main_~A~0#1|) |c_ULTIMATE.start_main_~X~0#1|) .cse5)))) (let ((.cse2 (fp.sub c_currentRoundingMode .cse4 (fp.mul c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse3 .cse4) |c_ULTIMATE.start_main_~X~0#1|) .cse4) .cse5)))) (fp.sub c_currentRoundingMode .cse2 (fp.mul c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse3 .cse2) .cse4) .cse2) .cse5)))))) (.cse1 ((_ to_fp 8 24) c_currentRoundingMode 100.0))) (and (fp.geq .cse0 (fp.neg .cse1)) (= (_ +zero 8 24) |c_ULTIMATE.start_main_~B~0#1|) (= |c_ULTIMATE.start_main_~i~0#1| (_ bv0 32)) (fp.leq .cse0 .cse1) (= (_ +zero 8 24) |c_ULTIMATE.start_main_~A~0#1|) (= |c_ULTIMATE.start_main_~B~0#1| |c_ULTIMATE.start_main_~X~0#1|) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2021-11-23 17:12:54,976 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (let ((.cse3 ((_ to_fp 8 24) c_currentRoundingMode 2.0)) (.cse4 ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 200.0)))) (let ((.cse2 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~B~0#1| (fp.mul c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse3 |c_ULTIMATE.start_main_~B~0#1|) |c_ULTIMATE.start_main_~A~0#1|) |c_ULTIMATE.start_main_~B~0#1|) .cse4)))) (fp.sub c_currentRoundingMode .cse2 (fp.mul c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse3 .cse2) |c_ULTIMATE.start_main_~B~0#1|) .cse2) .cse4))))) (.cse1 ((_ to_fp 8 24) c_currentRoundingMode 100.0))) (and (= (_ +zero 8 24) |c_ULTIMATE.start_main_~B~0#1|) (fp.geq .cse0 (fp.neg .cse1)) (= |c_ULTIMATE.start_main_~i~0#1| (_ bv0 32)) (= (_ +zero 8 24) |c_ULTIMATE.start_main_~A~0#1|) (= c_currentRoundingMode roundNearestTiesToEven) (fp.leq .cse0 .cse1))) is different from true [2021-11-23 17:12:57,366 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (let ((.cse3 ((_ to_fp 8 24) c_currentRoundingMode 2.0)) (.cse4 ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 200.0)))) (let ((.cse2 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~B~0#1| (fp.mul c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse3 |c_ULTIMATE.start_main_~B~0#1|) |c_ULTIMATE.start_main_~A~0#1|) |c_ULTIMATE.start_main_~B~0#1|) .cse4)))) (fp.sub c_currentRoundingMode .cse2 (fp.mul c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse3 .cse2) |c_ULTIMATE.start_main_~B~0#1|) .cse2) .cse4))))) (.cse1 ((_ to_fp 8 24) c_currentRoundingMode 100.0))) (and (= |c_ULTIMATE.start_main_~i~0#1| (_ bv1 32)) (= (_ +zero 8 24) |c_ULTIMATE.start_main_~B~0#1|) (fp.geq .cse0 (fp.neg .cse1)) (= (_ +zero 8 24) |c_ULTIMATE.start_main_~A~0#1|) (= c_currentRoundingMode roundNearestTiesToEven) (fp.leq .cse0 .cse1))) is different from true [2021-11-23 17:12:59,419 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (let ((.cse3 ((_ to_fp 8 24) c_currentRoundingMode 2.0)) (.cse4 ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 200.0)))) (let ((.cse2 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~B~0#1| (fp.mul c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse3 |c_ULTIMATE.start_main_~B~0#1|) |c_ULTIMATE.start_main_~A~0#1|) |c_ULTIMATE.start_main_~X~0#1|) .cse4)))) (fp.sub c_currentRoundingMode .cse2 (fp.mul c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse3 .cse2) |c_ULTIMATE.start_main_~X~0#1|) .cse2) .cse4))))) (.cse1 ((_ to_fp 8 24) c_currentRoundingMode 100.0))) (and (= |c_ULTIMATE.start_main_~i~0#1| (_ bv1 32)) (= (_ +zero 8 24) |c_ULTIMATE.start_main_~B~0#1|) (fp.leq .cse0 .cse1) (fp.geq .cse0 (fp.neg .cse1)) (= (_ +zero 8 24) |c_ULTIMATE.start_main_~A~0#1|) (= |c_ULTIMATE.start_main_~B~0#1| |c_ULTIMATE.start_main_~X~0#1|) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2021-11-23 17:13:05,753 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~B~0#1| (fp.mul c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 2.0) |c_ULTIMATE.start_main_~B~0#1|) |c_ULTIMATE.start_main_~A~0#1|) |c_ULTIMATE.start_main_~B~0#1|) ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 200.0))))) (.cse1 ((_ to_fp 8 24) c_currentRoundingMode 100.0))) (and (= (_ +zero 8 24) |c_ULTIMATE.start_main_~B~0#1|) (fp.geq .cse0 (fp.neg .cse1)) (fp.leq .cse0 .cse1) (= |c_ULTIMATE.start_main_~i~0#1| (_ bv2 32)) (= (_ +zero 8 24) |c_ULTIMATE.start_main_~A~0#1|) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2021-11-23 17:13:07,783 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~B~0#1| (fp.mul c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 2.0) |c_ULTIMATE.start_main_~B~0#1|) |c_ULTIMATE.start_main_~A~0#1|) |c_ULTIMATE.start_main_~X~0#1|) ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 200.0))))) (.cse1 ((_ to_fp 8 24) c_currentRoundingMode 100.0))) (and (fp.geq .cse0 (fp.neg .cse1)) (fp.leq .cse0 .cse1) (= (_ +zero 8 24) |c_ULTIMATE.start_main_~B~0#1|) (= |c_ULTIMATE.start_main_~i~0#1| (_ bv2 32)) (= (_ +zero 8 24) |c_ULTIMATE.start_main_~A~0#1|) (= |c_ULTIMATE.start_main_~B~0#1| |c_ULTIMATE.start_main_~X~0#1|) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2021-11-23 17:13:10,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:13:10,274 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2021-11-23 17:13:10,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-23 17:13:10,274 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.103448275862069) internal successors, (90), 29 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-23 17:13:10,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:13:10,278 INFO L225 Difference]: With dead ends: 85 [2021-11-23 17:13:10,278 INFO L226 Difference]: Without dead ends: 79 [2021-11-23 17:13:10,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 13 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 51.1s TimeCoverageRelationStatistics Valid=414, Invalid=1261, Unknown=17, NotChecked=1170, Total=2862 [2021-11-23 17:13:10,283 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:13:10,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 120 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 40 Invalid, 0 Unknown, 79 Unchecked, 0.2s Time] [2021-11-23 17:13:10,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-23 17:13:10,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 50. [2021-11-23 17:13:10,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:13:10,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-11-23 17:13:10,296 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 26 [2021-11-23 17:13:10,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:13:10,297 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-11-23 17:13:10,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.103448275862069) internal successors, (90), 29 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:13:10,298 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-11-23 17:13:10,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 17:13:10,299 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:13:10,299 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:13:10,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2021-11-23 17:13:10,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-23 17:13:10,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-23 17:13:10,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:13:10,905 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:13:10,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:13:10,906 INFO L85 PathProgramCache]: Analyzing trace with hash 240020196, now seen corresponding path program 1 times [2021-11-23 17:13:10,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:13:10,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916187209] [2021-11-23 17:13:10,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:13:10,908 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:13:10,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:13:10,909 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:13:10,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:13:11,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:13:11,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:13:11,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:11,921 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:11,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:13:12,500 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:12,500 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:13:12,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916187209] [2021-11-23 17:13:12,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1916187209] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:13:12,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1161174687] [2021-11-23 17:13:12,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:13:12,501 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:13:12,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:13:12,512 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:13:12,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-23 17:13:13,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:13:13,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:13:13,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:13,588 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:13,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:13:13,819 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:13,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1161174687] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:13:13,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062522976] [2021-11-23 17:13:13,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:13:13,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:13:13,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:13:13,822 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:13:13,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 17:13:14,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:13:14,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:13:14,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:14,447 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:14,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:13:14,711 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:14,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062522976] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:13:14,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:13:14,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-23 17:13:14,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181375598] [2021-11-23 17:13:14,713 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:13:14,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 17:13:14,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:13:14,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 17:13:14,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-23 17:13:14,715 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:13:15,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:13:15,386 INFO L93 Difference]: Finished difference Result 130 states and 154 transitions. [2021-11-23 17:13:15,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 17:13:15,387 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-23 17:13:15,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:13:15,389 INFO L225 Difference]: With dead ends: 130 [2021-11-23 17:13:15,389 INFO L226 Difference]: Without dead ends: 126 [2021-11-23 17:13:15,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:13:15,392 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 127 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:13:15,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 204 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 17:13:15,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-23 17:13:15,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 122. [2021-11-23 17:13:15,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.165289256198347) internal successors, (141), 121 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:13:15,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 141 transitions. [2021-11-23 17:13:15,413 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 141 transitions. Word has length 28 [2021-11-23 17:13:15,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:13:15,414 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 141 transitions. [2021-11-23 17:13:15,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:13:15,414 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 141 transitions. [2021-11-23 17:13:15,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-23 17:13:15,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:13:15,418 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:13:15,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:13:15,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:13:15,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:13:16,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:13:16,024 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:13:16,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:13:16,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1333632484, now seen corresponding path program 2 times [2021-11-23 17:13:16,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:13:16,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [939573857] [2021-11-23 17:13:16,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:13:16,026 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:13:16,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:13:16,026 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:13:16,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:13:17,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:13:17,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:13:17,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:13:17,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:18,544 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:18,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:13:20,307 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:20,307 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:13:20,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [939573857] [2021-11-23 17:13:20,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [939573857] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:13:20,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1168531709] [2021-11-23 17:13:20,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:13:20,308 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:13:20,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:13:20,315 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:13:20,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-23 17:13:22,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:13:22,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:13:22,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:13:22,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:23,067 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:23,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:13:23,615 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:23,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1168531709] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:13:23,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160890901] [2021-11-23 17:13:23,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:13:23,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:13:23,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:13:23,622 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:13:23,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 17:13:24,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:13:24,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:13:24,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:13:24,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:25,188 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:25,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:13:25,677 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:25,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160890901] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:13:25,677 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:13:25,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 24 [2021-11-23 17:13:25,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594568992] [2021-11-23 17:13:25,678 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:13:25,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 17:13:25,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:13:25,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 17:13:25,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-11-23 17:13:25,682 INFO L87 Difference]: Start difference. First operand 122 states and 141 transitions. Second operand has 24 states, 24 states have (on average 4.666666666666667) internal successors, (112), 24 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:13:28,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:13:28,673 INFO L93 Difference]: Finished difference Result 274 states and 328 transitions. [2021-11-23 17:13:28,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 17:13:28,674 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.666666666666667) internal successors, (112), 24 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-23 17:13:28,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:13:28,678 INFO L225 Difference]: With dead ends: 274 [2021-11-23 17:13:28,678 INFO L226 Difference]: Without dead ends: 270 [2021-11-23 17:13:28,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 17:13:28,681 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 508 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:13:28,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 836 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 17:13:28,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-11-23 17:13:28,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 266. [2021-11-23 17:13:28,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 1.1660377358490566) internal successors, (309), 265 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:13:28,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 309 transitions. [2021-11-23 17:13:28,714 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 309 transitions. Word has length 58 [2021-11-23 17:13:28,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:13:28,715 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 309 transitions. [2021-11-23 17:13:28,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.666666666666667) internal successors, (112), 24 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:13:28,716 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 309 transitions. [2021-11-23 17:13:28,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-23 17:13:28,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:13:28,722 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:13:28,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:13:28,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:13:29,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:13:29,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:13:29,344 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:13:29,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:13:29,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1678097436, now seen corresponding path program 3 times [2021-11-23 17:13:29,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:13:29,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1528324410] [2021-11-23 17:13:29,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:13:29,346 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:13:29,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:13:29,350 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:13:29,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:13:29,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 17:13:29,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:13:29,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:13:29,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:30,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 1092 trivial. 0 not checked. [2021-11-23 17:13:30,218 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:13:30,218 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:13:30,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1528324410] [2021-11-23 17:13:30,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1528324410] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:13:30,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:13:30,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 17:13:30,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992209514] [2021-11-23 17:13:30,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:13:30,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:13:30,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:13:30,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:13:30,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:13:30,221 INFO L87 Difference]: Start difference. First operand 266 states and 309 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:13:32,519 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:13:33,766 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:13:33,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:13:33,979 INFO L93 Difference]: Finished difference Result 457 states and 520 transitions. [2021-11-23 17:13:33,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:13:33,980 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-11-23 17:13:33,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:13:33,984 INFO L225 Difference]: With dead ends: 457 [2021-11-23 17:13:33,984 INFO L226 Difference]: Without dead ends: 453 [2021-11-23 17:13:33,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:13:33,987 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:13:33,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 47 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2021-11-23 17:13:33,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-11-23 17:13:34,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 259. [2021-11-23 17:13:34,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.1666666666666667) internal successors, (301), 258 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:13:34,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 301 transitions. [2021-11-23 17:13:34,022 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 301 transitions. Word has length 118 [2021-11-23 17:13:34,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:13:34,023 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 301 transitions. [2021-11-23 17:13:34,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:13:34,024 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 301 transitions. [2021-11-23 17:13:34,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-23 17:13:34,027 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:13:34,027 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:13:34,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:13:34,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:13:34,246 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:13:34,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:13:34,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1047511030, now seen corresponding path program 4 times [2021-11-23 17:13:34,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:13:34,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1936032112] [2021-11-23 17:13:34,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:13:34,247 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:13:34,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:13:34,248 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:13:34,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 17:13:37,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:13:37,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:13:37,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 17:13:37,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:40,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:40,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:13:45,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:45,990 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:13:45,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1936032112] [2021-11-23 17:13:45,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1936032112] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:13:45,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [532529423] [2021-11-23 17:13:45,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:13:45,991 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:13:45,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:13:45,995 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:13:45,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-23 17:13:51,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:13:51,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:13:51,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 17:13:51,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:52,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:52,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:13:52,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:52,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [532529423] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:13:52,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635844090] [2021-11-23 17:13:52,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:13:52,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:13:52,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:13:52,974 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:13:52,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 17:13:55,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:13:55,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:13:55,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 17:13:55,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:56,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:56,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:13:57,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:57,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635844090] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:13:57,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:13:57,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 25, 25, 25] total 48 [2021-11-23 17:13:57,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653357555] [2021-11-23 17:13:57,444 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:13:57,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-23 17:13:57,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:13:57,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-23 17:13:57,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2021-11-23 17:13:57,448 INFO L87 Difference]: Start difference. First operand 259 states and 301 transitions. Second operand has 48 states, 48 states have (on average 4.833333333333333) internal successors, (232), 48 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:14:15,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:14:15,288 INFO L93 Difference]: Finished difference Result 662 states and 776 transitions. [2021-11-23 17:14:15,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-23 17:14:15,289 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.833333333333333) internal successors, (232), 48 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-11-23 17:14:15,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:14:15,294 INFO L225 Difference]: With dead ends: 662 [2021-11-23 17:14:15,295 INFO L226 Difference]: Without dead ends: 658 [2021-11-23 17:14:15,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 724 GetRequests, 656 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=1678, Invalid=3152, Unknown=0, NotChecked=0, Total=4830 [2021-11-23 17:14:15,298 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 1892 mSDsluCounter, 3260 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1892 SdHoareTripleChecker+Valid, 3404 SdHoareTripleChecker+Invalid, 1195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:14:15,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1892 Valid, 3404 Invalid, 1195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1149 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-23 17:14:15,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-11-23 17:14:15,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 547. [2021-11-23 17:14:15,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 1.1666666666666667) internal successors, (637), 546 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:14:15,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 637 transitions. [2021-11-23 17:14:15,349 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 637 transitions. Word has length 118 [2021-11-23 17:14:15,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:14:15,350 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 637 transitions. [2021-11-23 17:14:15,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.833333333333333) internal successors, (232), 48 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:14:15,357 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 637 transitions. [2021-11-23 17:14:15,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-23 17:14:15,362 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:14:15,362 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:14:15,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:14:15,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-23 17:14:15,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-11-23 17:14:15,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:14:15,985 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:14:15,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:14:15,986 INFO L85 PathProgramCache]: Analyzing trace with hash -853406730, now seen corresponding path program 5 times [2021-11-23 17:14:15,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:14:15,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1141645948] [2021-11-23 17:14:15,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:14:15,988 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:14:15,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:14:15,989 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:14:15,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 17:14:51,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2021-11-23 17:14:51,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:14:51,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-23 17:14:51,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:00,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:15:00,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:15:25,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:15:25,631 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:25,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1141645948] [2021-11-23 17:15:25,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1141645948] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:15:25,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1383889387] [2021-11-23 17:15:25,631 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:15:25,632 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:15:25,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:15:25,648 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:15:25,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-23 17:16:05,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2021-11-23 17:16:05,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:16:05,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-23 17:16:05,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:07,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:40,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:40,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1383889387] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:40,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089222834] [2021-11-23 17:16:40,979 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:16:40,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:16:40,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:16:40,981 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:16:40,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60c0de16-8441-4094-8353-aa7528aebb92/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process